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United States Patent | 5,651,412 |
Williams ,   et al. | July 29, 1997 |
A strip caster (10) for producing a continuous strip (24) includes a tundish (12) for containing a melt (14), a pair of horizontally disposed water cooled casting rolls (22) and devices (29) for electrostatically coating the outer peripheral chill surfaces (44) of the casting rolls with a powder flux material (56). The casting rolls are juxtaposed relative to one another for forming a pouting basin (18) for receiving the melt through a teeming tube (16) thereby establishing a meniscus (20) between the rolls for forming the strip. The melt is protected from the outside air by a non-oxidizing gas passed through a supply line (28) to a sealing chamber (26). A preferred flux is boron oxide having a melting point of about 550.degree. C. The flux coating enhances wetting of the steel melt to the casting roll and dissolves any metal oxide formed on the roll.
Inventors: | Williams; Robert S. (Fairfield, OH); O'Malley; Ronald J. (Miamisburg, OH); Sussman; Richard C. (West Chester, OH) |
Assignee: | Armco Inc. (Middletown, OH) |
Appl. No.: | 540370 |
Filed: | October 6, 1995 |
Current U.S. Class: | 164/479; 164/268; 164/480 |
Intern'l Class: | B22D 011/06 |
Field of Search: | 164/463,472,480,72,428,268,423,429,479,149 148/26 75/305,307,309,313 |
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